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From "HeeSoo Kim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9525) hadoop utilities need to support provided delegation tokens
Date Mon, 14 Dec 2015 21:59:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056795#comment-15056795
] 

HeeSoo Kim commented on HDFS-9525:
----------------------------------

[~daryn], [~aw] Thank you for your feedback.
{quote}
An enhanced fetchdt is probably the best solution to side step the lack of realm trust.
{quote}
That's right. We can use fetchdt to get the token from un-trusted realm cluster.
However, WebHDFS still has a problem to use the token which get the token using fetchdt.

I changed the code that supports the following features.
# It supports multiple token files when we fetched the delegationToken from target filesystem
using fetchdt.
# If we want to distcp from non-kerberos cluster to kerberos cluster, WebHDFS does not use
the delegationToken even ugi has the webHDFS's token.  It supports to use token for WebHDFS
on non-kerberos cluster.

> hadoop utilities need to support provided delegation tokens
> -----------------------------------------------------------
>
>                 Key: HDFS-9525
>                 URL: https://issues.apache.org/jira/browse/HDFS-9525
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: security
>    Affects Versions: 3.0.0
>            Reporter: Allen Wittenauer
>            Assignee: HeeSoo Kim
>            Priority: Blocker
>             Fix For: 3.0.0
>
>         Attachments: HDFS-7984.001.patch, HDFS-7984.002.patch, HDFS-7984.003.patch, HDFS-7984.004.patch,
HDFS-7984.005.patch, HDFS-7984.006.patch, HDFS-7984.007.patch, HDFS-7984.patch
>
>
> When using the webhdfs:// filesystem (especially from distcp), we need the ability to
inject a delegation token rather than webhdfs initialize its own.  This would allow for cross-authentication-zone
file system accesses.



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